Malicious PDF — malware analysis report

Static analysis result for SHA-256 3904c7a9d52d1b3b…

MALICIOUS

PDF

29.4 KB Created: 2020-06-04 03:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3f3b3eaaf1f1951fde06fcbe98fdd39d SHA-1: c7bae38962b0f175e872f544e2f51cd9023b8aa8 SHA-256: 3904c7a9d52d1b3b7a809fadd58c88e0c94e4d489808a938a7b783300eca19b9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to domains that appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a redirection or content delivery scheme. The document body also contains embedded URLs, reinforcing the attack pattern of directing users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://kjaneco.com/uploads/1/3/0/3/130379199/130379199.html#the+royal+cock+of+1469 PDF link annotation
    • http://leapsandjumpsgymnastics.com/uploads/1/3/0/5/130588185/ratemerenesek.pdfIn PDF document text
    • http://exchange19.ccfiji.com/uploads/1/3/1/3/131381411/tuwevaziz-fizaxupafak-pagewexetinulex-bolaraxo.pdfIn PDF document text
    • http://luciaventuraaa.com/uploads/1/3/1/4/131407539/xesasagijamajepuzibu.pdfIn PDF document text
    • http://mta-sts.ivoryleaguepublishing.com/uploads/1/3/1/3/131381480/dunal.pdfIn PDF document text
    • http://network35.org.uk/uploads/1/3/0/6/130605034/jozozof.pdfIn PDF document text
    • http://yourbusinesstracker.com/uploads/1/3/1/6/131606492/66f9d948c.pdfIn PDF document text
    • http://lizbuyshouses.net/uploads/1/3/0/6/130621178/8aad6dd3cd89.pdfIn PDF document text
    • http://kjaneco.com/uploads/1/3/0/3/130379199/terms.htmlIn PDF document text
    • http://kjaneco.com/uploads/1/3/0/3/130379199/dmca.htmlIn PDF document text
    • http://kjaneco.com/uploads/1/3/0/3/130379199/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jumitedav.files.wordpress.com/2020/06/76433148005.pdfIn PDF document text
    • https://rabimigoliv.files.wordpress.com/2020/06/31139023056.pdfIn PDF document text
    • https://megujujuget.files.wordpress.com/2020/06/mekopixipuruzogozogu.pdfIn PDF document text
    • https://vedapam.files.wordpress.com/2020/06/61459775250.pdfIn PDF document text
    • https://miserowage857454741.files.wordpress.com/2020/06/bulogivefirimubupir.pdfIn PDF document text
    • https://jolikakotex.files.wordpress.com/2020/06/girazolegujutovujigonufat.pdfIn PDF document text
    • https://vusuletameta.files.wordpress.com/2020/06/mixufodedaxifilevike.pdfIn PDF document text
    • https://divotuzilora.files.wordpress.com/2020/06/zuxesuvagumaver.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ACC 9304 bytes
SHA-256: 4187ffcb186a4a157c0fa95130c62cdf6047b20593295755941d898a29872f63

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